At present, it refers to a kind of cathode structure which is beneficial to relieve or prevent constipation and to clear the gastrointestinal tract. The composition includes an effective amount of induced biohalogenation dechlorination, including part of the formula structure (1). 11. Claim 11: a halogenated biological fat compound, the characteristics of which are represented by one (2) formula, wherein L and m are hydrogen, hydrogen Xi, halogen, low hydrocarbon, hydrogen oxy (low) or oxo, wherein at least one l and M is a different group of hydrogen, The rings of five members can have at least one double link, a is - ch8322； - cock83222； - Oh,-B es-ch832222-ch8322 -；Z is another formula (3) or (4), where r8308y and r83099 are hydrogen, hydrogen Xi, halogen, low tar, low oxygen or hydrogen peroxide (lower),R83088 and r83099 are not the same hydrogen Xi and alcoxi； R1 is a liquefied hydrogen residue lower than or equal to saturated or unsaturated, which is replaced or no longer produced by halogen, asphalt, hydroxyl, oxo, Arilo or heterocyclic cyclic group, and at least one carbon atom in liquefied hydrogen is replaced by oxygen, nitrogen or sulfur； X1 and X2 are the same or different halogen atoms； R2 is a single bond or lower tar； R3 is low tar, low oxygen, cyclopentyl (lower),CYCLOPROPYLENE glycol (Times)Arilo, ariloxi, heteromorphic group or heteromorphic group oxi.La presente se refiere a una composición catártica que es útil para aliviar o prevenir la constipación, y también para purgar el tracto gastrointestinal. La composición comprende una cantidad efectiva para inducir catarsis de lípido bioactivo halogenado que comprende la estructura parcial de fórmula (1). Reivindicación 11: Un compuesto lípido bioactivo halogenado, caracterizado porque está representado por la fórmula (2) donde L y M son hidrógeno, hidroxi, halógeno, alquilo inferior, hidroxialquilo (inferior) u oxo, donde al menos uno de L y M es un grupo distinto de hidrógeno, y el anillo de cinco mi
